How to convert letters to lowercase in javascript

Javascript method to convert letters to lowercase: 1. Use toLowerCase(), the syntax "string.toLowerCase()"; 2. Use toLocaleLowerCase(), the syntax "string.toLocaleLowerCase()".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript converts letters to lowercase

Method 1: Use toLowerCase() method

The toLowerCase() method is used to convert a string to lowercase. The specific syntax format is as follows:

string.toLowerCase()

Example:

<script type="text/javascript">
console.log("A".toLowerCase());
console.log("B".toLowerCase());
console.log("C".toLowerCase());
</script>

Output result:

Method 2 : Use the toLocaleLowerCase() method

toLocaleLowerCase() method to convert the string to lowercase according to the local host's locale. The specific syntax format is as follows:

string.toLocaleLowerCase()

Generally, this method returns the same result as the toLowerCase() method. Only a few languages ​​(such as Turkish) have local-specific case mapping.

Note: The toLocaleLowerCase() method does not change the original string.

Example:

<script type="text/javascript">
document.write("P".toLocaleLowerCase());
document.write("H".toLocaleLowerCase());
document.write("P".toLocaleLowerCase());
</script>

Output result:

[Recommended learning: javascript advanced tutorial]

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